Chongqing Environmental Protection Center for Shale Gas Technology & Development, Fuling, Chongqing, 400800, China.
Chongqing Environmental Protection Engineering Technology Center for Shale Gas Development, Fuling, Chongqing, 408000, China.
Environ Sci Pollut Res Int. 2020 Jun;27(18):23364-23368. doi: 10.1007/s11356-020-09029-z. Epub 2020 May 6.
The feasibility of coordinated use of water-based drilling cuttings (WDC), fly ash, and phosphogypsum (PG) as raw materials for the preparation of WDC non-autoclaved aerated concrete (WNAAC) was evaluated by laboratory experiment. The results showed that the pozzolanic reaction of the multi-component cementitious system containing 40% (in mass) of WDC is significantly promoted. Newly formed C-S-H gel and ettringite with the uniform distribution of fibrous and flake-like shape occur, presenting a denser and interlock microstructure. In addition, after cured by steam at 80 °C for 24 h, the mechanical property and unit weight of the WNAAC prepared with 40% WDC fully meet the B06, A3.5 grade of China state standard (GB/T11968-2006). Environmental performance tests confirm that the WNAAC prepared with 40% WDC does not create any secondary contamination.
通过实验室实验评估了水基钻井废弃物（WDC）、粉煤灰和磷石膏（PG）作为制备 WDC 免蒸压加气混凝土（WNAAC）原料的协同使用的可行性。结果表明，含有 40%（质量分数）WDC 的多组分胶凝体系的火山灰反应得到显著促进。新形成的 C-S-H 凝胶和呈纤维状和片状均匀分布的钙矾石，呈现出更致密和联锁的微观结构。此外，经过 80°C 蒸汽养护 24 h 后，用 40%WDC 制备的 WNAAC 的力学性能和单位重量完全满足中国国家标准（GB/T11968-2006）B06、A3.5 级的要求。环境性能测试证实，用 40%WDC 制备的 WNAAC 不会产生任何二次污染。
